One or more server devices may receive first navigation information identifying a first set of documents that are selected after a first document is presented and second navigation information identifying a second set of documents that are selected after a second document is presented; compare the first set of documents to the second set of documents; generate a similarity score based on the comparing; determine based on the similarity score, that the first document is similar to the second document; and generate, based on determining that the first document is similar to the second document, a cluster that includes identification information identifying the first document and the second document.